The 30 ml cobalt blue glass dropper bottles with black plastic screw caps offer a simple, reliable, and cost-effective solution for storing essential oils, tinctures, perfume bases, and cosmetic preparations. This 110-piece pack is intended for essential oil creators, aromatherapy artisans, and cosmetic formulator small business owners who wish to build a uniform product series.
What is included in the 110-piece pack
110 cobalt blue glass dropper bottles, each with a nominal 30 ml fill capacity and a matching black plastic screw cap. The height of one bottle is approximately 85 mm and the diameter is 35 mm. The total gross weight of the pack is around 6.05 kg, and an empty bottle with cap weighs approximately 55 g together. The standard GL18 thread also allows the cap to be swapped for another type — a pipette dropper, an aluminium cap, or a child-resistant closure.
Cobalt blue glass and the benefit of light filtering
Cobalt blue glass absorbs not only the UV range but also part of the shorter visible wavelengths — particularly blue and green light. This extended protection provides longer shelf life for preparations sensitive to light. The terpene compounds of essential oils, the fatty acids of botanical oils, and vitamins degrade more slowly in cobalt blue glass. The glass is fully chemically inert and adds no off-flavour or odour to the contents.
Details of the black plastic screw cap
The black screw cap provides a tight, airtight seal. Its inner liner prevents the evaporation of volatile components and reduces oxidation by air. The plastic cap is lightweight, impact-resistant, and corrosion-free, making it suitable for active use — for example, during daily dispensing. It can easily be labelled and fits neatly into uniform product series.
Areas of use
- Bottling essential oil blends and aromatherapy formulations
- Storing perfume bases, colognes, and scented serums
- Filling natural cosmetics (facial serums, body oils, hair oils)
- Dispensing botanical tinctures, hydrosols, and flower essences
- DIY beauty products and own-brand creation for small business owners
Cleaning and reuse
The bottles and caps can be rinsed in warm soapy water before and after use. For stubborn scent residue, pure ethyl alcohol (70%) is recommended: a few millilitres in the bottle, left to stand for several hours, then thoroughly rinsed will remove the remaining traces. Avoid dishwasher use if there is a label or printed surface on the bottle. The glass is highly recyclable.